diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/gen6_blorp.c | 68 |
1 files changed, 65 insertions, 3 deletions
diff --git a/src/mesa/drivers/dri/i965/gen6_blorp.c b/src/mesa/drivers/dri/i965/gen6_blorp.c index cd02b2498bb..831ff3a5528 100644 --- a/src/mesa/drivers/dri/i965/gen6_blorp.c +++ b/src/mesa/drivers/dri/i965/gen6_blorp.c @@ -34,10 +34,45 @@ #include "brw_draw.h" static void +gen6_blorp_emit_input_varying_data(struct brw_context *brw, + const struct brw_blorp_params *params, + unsigned *offset, + unsigned *size) +{ + const unsigned vec4_size_in_bytes = 4 * sizeof(float); + const unsigned max_num_varyings = + DIV_ROUND_UP(sizeof(params->wm_inputs), vec4_size_in_bytes); + const unsigned num_varyings = params->wm_prog_data->num_varying_inputs; + + *size = num_varyings * vec4_size_in_bytes; + + const float *const inputs_src = (const float *)¶ms->wm_inputs; + float *inputs = (float *)brw_state_batch(brw, AUB_TRACE_VERTEX_BUFFER, + *size, 32, offset); + + /* Walk over the attribute slots, determine if the attribute is used by + * the program and when necessary copy the values from the input storage to + * the vertex data buffer. + */ + for (unsigned i = 0; i < max_num_varyings; i++) { + const gl_varying_slot attr = VARYING_SLOT_VAR0 + i; + + if (!(params->wm_prog_data->inputs_read & BITFIELD64_BIT(attr))) + continue; + + memcpy(inputs, inputs_src + i * 4, vec4_size_in_bytes); + + inputs += 4; + } +} + +static void gen6_blorp_emit_vertex_data(struct brw_context *brw, const struct brw_blorp_params *params) { uint32_t vertex_offset; + uint32_t const_data_offset = 0; + unsigned const_data_size = 0; /* Setup VBO for the rectangle primitive.. * @@ -65,6 +100,11 @@ gen6_blorp_emit_vertex_data(struct brw_context *brw, * dw6: Vertex Position Z. * dw7: Vertex Position W. * + * dw8: Flat vertex input 0 + * dw9: Flat vertex input 1 + * ... + * dwn: Flat vertex input n - 8 + * * For details, see the Sandybridge PRM, Volume 2, Part 1, Section 1.5.1 * "Vertex URB Entry (VUE) Formats". * @@ -72,8 +112,11 @@ gen6_blorp_emit_vertex_data(struct brw_context *brw, * zero and W to one. Header words dw0-3 are all zero. There is no need to * include the fixed values in the vertex buffer. Vertex fetcher can be * instructed to fill vertex elements with constant values of one and zero - * instead of reading them from the buffer. See the vertex element setup - * below. + * instead of reading them from the buffer. + * Flat inputs are program constants that are not interpolated. Moreover + * their values will be the same between vertices. + * + * See the vertex element setup below. */ const float vertices[] = { /* v0 */ (float)params->x0, (float)params->y1, @@ -87,8 +130,13 @@ gen6_blorp_emit_vertex_data(struct brw_context *brw, &vertex_offset); memcpy(vertex_data, vertices, sizeof(vertices)); + if (params->wm_prog_data && params->wm_prog_data->num_varying_inputs) + gen6_blorp_emit_input_varying_data(brw, params, + &const_data_offset, + &const_data_size); + /* 3DSTATE_VERTEX_BUFFERS */ - const int num_buffers = 1; + const int num_buffers = 1 + (const_data_size > 0); const int batch_length = 1 + 4 * num_buffers; BEGIN_BATCH(batch_length); @@ -99,6 +147,20 @@ gen6_blorp_emit_vertex_data(struct brw_context *brw, EMIT_VERTEX_BUFFER_STATE(brw, 0 /* buffer_nr */, brw->batch.bo, vertex_offset, vertex_offset + sizeof(vertices), stride, 0 /* steprate */); + + if (const_data_size) { + /* Tell vertex fetcher not to advance the pointer in the buffer when + * moving to the next vertex. This will effectively provide the same + * data for all the vertices. For flat inputs only the data provided + * for the first provoking vertex actually matters. + */ + const unsigned stride_zero = 0; + EMIT_VERTEX_BUFFER_STATE(brw, 1 /* buffer_nr */, brw->batch.bo, + const_data_offset, + const_data_offset + const_data_size, + stride_zero, 0 /* step_rate */); + } + ADVANCE_BATCH(); } |